Abstract: Hardware of a network switching device supports quantized congestion notification (QCN) to notify senders of network packets received at the network switching device that the network switching device is experiencing congestion. The hardware is instead programmed to notify a processor of the network switching device of the congestion at an egress queue of the network switching device. The processor receives a congestion notification message (CNM) from the hardware that the hardware has detected the congestion at the egress queue. Responsive to receiving the CNM from the hardware, the processor detects a microburst of the network packets at the egress queue of the network switching device.

Abstract: Hardware of a network switching device supports quantized congestion notification (QCN) to notify senders of network packets received at the network switching device that the network switching device is experiencing congestion. The hardware is instead programmed to notify a processor of the network switching device of the congestion at an egress queue of the network switching device. The processor receives a congestion notification message (CNM) from the hardware that the hardware has detected the congestion at the egress queue. Responsive to receiving the CNM from the hardware, the processor detects a microburst of the network packets at the egress queue of the network switching device.

Abstract: In one embodiment, an apparatus for providing quantized congestion notification (QCN) proxy functionality to a network device control plane includes a processor and logic integrated with and/or executable by the processor, the logic being configured to enable QCN proxy functionality for a particular congestion notification priority value (CNPV) on each edge port of a QCN edge switch, wherein the QCN edge switch includes one or more edge ports connected to devices outside of a congestion notification domain (CND) that operates on the particular CNPV, and forward congestion notification packets received at the QCN edge switch using the QCN proxy functionality when the packets are destined for one of the devices connected outside of the CND that is not QCN-enabled. Other systems, methods, and computer program products for providing QCN proxy functionality to a network device control plane are described in more embodiments.

Abstract: A method may include transmitting data frames from a reaction point of a source device. The method may also include receiving, at the reaction point, congestion notification messages corresponding to the transmitted data frames and containing congestion feedback data regarding a particular network switching device and an identifier of the particular network switching device. The method may also include modifying a congestion profile for the particular network switching device by correlating the identifier of the particular network switching device to a profile entry, and updating the profile entry with the congestion feedback data.

Abstract: In one embodiment, an apparatus for providing quantized congestion notification (QCN) proxy functionality to a network device control plane includes a processor and logic integrated with and/or executable by the processor, the logic being configured to enable QCN proxy functionality for a particular congestion notification priority value (CNPV) on each edge port of a QCN edge switch, wherein the QCN edge switch includes one or more edge ports connected to devices outside of a congestion notification domain (CND) that operates on the particular CNPV, and forward congestion notification packets received at the QCN edge switch using the QCN proxy functionality when the packets are destined for one of the devices connected outside of the CND that is not QCN-enabled. Other systems, methods, and computer program products for providing QCN proxy functionality to a network device control plane are described in more embodiments.

Abstract: A method may include transmitting data frames from a reaction point of a source device. The method may also include receiving, at the reaction point, congestion notification messages corresponding to the transmitted data frames and containing congestion feedback data regarding a particular network switching device and an identifier of the particular network switching device.

Abstract: A method, computer program product and computer system to extend Quantized Congestion Notification protocol to receive a signal to activate Quantized Congestion Notification with a hybrid congestion notification control choice, the signal additionally including an alternate priority value. The per-port per-priority protocol variables and per-device per-Congestion-Notification-Priority-Value protocol variables are set to automatically assign a defense mode. The per-port per-priority protocol variables and a per-device per-Congestion-Notification-Priority-Value protocol variables are set to manually assign an alternate priority value.